Good news, musical fans! The teaser trailer for Mamma Mia, starring Meryl Streep, Amanda Seyfried, Pierce Brosnan and Colin Firth, is now online in all its cheery song-and-dance glory. The story focuses on Sophie's (Amanda Seyfried) search to find out which of three men is her father as she prepares to get married, all set to Abba music. The setting is the vibrantly colorful Greece and today's little teaser trailer is like a jolt of freshness and light. I have to admit, it put me in a fantastic mood. The movie opens July 18. To check out the preview, read more.